string(233) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A6%82%E4%BD%95%E6%B8%85%E7%90%86ipad%E7%9A%84%E5%86%85%E5%AD%98 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
如何清理ipad的内存
